From: Jonathan Wakely <jwakely@redhat.com>
Date: Thu, 29 Oct 2020 22:47:22 +0000 (+0000)
Subject: libstdc++: Avoid narrowing conversion in subrange constructor
X-Git-Tag: basepoints/gcc-12~3704
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a55cda891d69b5a238d2e237903829995ca7249c;p=thirdparty%2Fgcc.git

libstdc++: Avoid narrowing conversion in subrange constructor

libstdc++-v3/ChangeLog:

	* include/bits/ranges_util.h (subrange::subrange(R&&)): Use
	direct-initialization instead of list-initialization, so a
	potential narrowing conversion from ranges::size(r) to the
	stored size isn't ill-formed.
---

diff --git a/libstdc++-v3/include/bits/ranges_util.h b/libstdc++-v3/include/bits/ranges_util.h
index cc50e2ad4e42..416c33462541 100644
--- a/libstdc++-v3/include/bits/ranges_util.h
+++ b/libstdc++-v3/include/bits/ranges_util.h
@@ -247,7 +247,7 @@ namespace ranges
 	  && convertible_to<sentinel_t<_Rng>, _Sent>
 	constexpr
 	subrange(_Rng&& __r) requires _S_store_size && sized_range<_Rng>
-	: subrange{__r, ranges::size(__r)}
+	: subrange(__r, ranges::size(__r))
 	{ }
 
       template<__detail::__not_same_as<subrange> _Rng>